With his mostly hands-off style, Guillermo del Toro's credits as a producer are mounting up to an impressive cv: Splice, Biutiful, The Orphanage (with which this shares a lead, Belén Rueda). A woman, rapidly losing her sight to a congenital illness, investigates the suspicious "suicide" of her already blind identical twin sister.

It's closer in spirit and execution to an early film from Hitchcock acolytes Brian de Palma and Dario Argento than it is like anything from the master himself. While it's a little overlong and slightly flabby in places, it plays mostly fair so when a few of the more ludicrous twists arrive in the second half, there's enough goodwill generated by the thoughtful, creepy and effective setup to carry things through to the end.